The three situations were two cars turning right at a "T" intersection, two oncoming cars turning into the same street at an uncontrolled intersection, and two oncoming cars turning into the same street from stop signs.

The answer in each situation was correctly identified by at least 70 per cent of respondents.

But 36 of the 67 people got at least one of the answers wrong.

A survey of 6000 Automobile Association members found about four-fifths were confident in their ability to follow the new rules.

But in an nzherald.co.nz online poll of 22,689 readers, taken before the NZTA campaign started, a third of respondents said they did not understand the rules.

When similar changes were adopted in Victoria, Australia, in 1993, they resulted in a 7.1 per cent reduction in crashes at intersections.